wellman



(No Model.)

S. T. WELLMAN, J. W. SEAVER 8v. C. H. WELLMAN. BRAKE.

No. 596 ,0 97 Patented Deo. 28, 1897.

l//fl WIT/VESSES:

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SAMUELA T. VELLMAN, JOI-IN W. SEAVER, AND CHARLES H. VELLMAN, OF CLEVELAND, OHIO, ASSIGNORS TO rI HE WELLMAN-SEAVER ENGINEER ING COMPANY, OF SAME PLACE.

BRAKE.

SPECIFICATION forming part of Letters Patent N o. 596,097, dated December 28, 1897. Application filed February 23, 1897.Y Serial No. 624,547. (No model.)

To all whom it may concern,.-

Be it known that we, SAMUEL T. WELLMAN, JOHN W. SEAvER, and CHARLES H. WELL- MAN, citizens of the United States, and residents of Cleveland, county of Cuyahoga, and rState of Ohio, have invented certain new and useful Improvements in Brakes,of which the following is a specification, the principle of the invention being herein explained and the I lo best mode in which we have contemplated applying that principle, so as to distinguish it from other inventions.

The annexed drawings and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting but one of various mechanical forms in which the principle of the invention may be used.

In the said annexed drawings, Figure I repzo resents a vertical longitudinal cross-sectional view of a brake, showing a manual releasing mechanism as applied thereto. Fig. II represents a vertical longitudinal cross-sectional view of a combined clutch and brake embody- 2 5 ing our invention. y i In Fig. I, A is the brake-casing, which is suitably attached to the frame or body which supports the journal-bearing of the shaft.

The shaft B is provided with a squared end 3o b, upon which t and revolve with the shaft the friction-disks C. Alternate stationary disks C' are held within the-casing A by suitable lugs c and grooves a in the casing.

The end portion A of the casing A is pro- 3 5 vided with the electromagnets D. In terposed between said magnets and the disks is the armature E, and between the armature E and the disks is placed the packing-disk F, which also'slides over the end of the shaft B. The

4o armature is provided with lugs c, which slide tact and creates frictional resistance on the surface thereof and produces thereby the braking action. The current being turned on, the armature is attracted and the brake released.

A rod J, threaded into the center of the armature, passes through the spring and cap and is suitably connected with a lever K, pivoted upon the cap Gr. This rod and lever form an independent means for releasing the brake, so that the magnets need not be depended upon entirely for the operation of the device, and provides an operating means in case of accident to the electrical mechanism.

Fig. II illustrates our improved brake so arranged as to also form a clutch.

The brake-casing A2 is fastened by means ofthe lugs a2 to a floor or to a structure to which it is to be applied, and has alternate friction-disks C and C', arranged therein in a manner similar to that shown in the brake illustrated in Fig. I, and hereinafter described. The hollow shaft B extends through and rotates in the bore b of said casing. Loosely mounted upon the said shaft is the driving-gear M, which is provided with electromagnets D', embedded in suitable cavities m, formed in said gear and projecting to within a short distance of the inner face m of said gear. The central bore 'm2 of said gear is countersunk at its inner end to admit the shoulder b2, which in conjunction with the VcollarB2 prevents lateral displacement of said gear M.

Interposed between the gear M and the friction-plates C and C in the casing A2 is the armature E,'formed with the square iiange e', upon which are seated the plates C. A pin N extends through said flange and through an elongated hole h2 in the shaft B', whereby the armature is rotatively fixed upon said shaft, but is permitted, by virtue of the elongation of said hole b2, a certain amount of longitu di'nal play.

A rod .I is threaded into a plug P, which slides in the bore of the shaft and through which the pin N also extends. A spring H' is interposed between the said sliding plug and the end stationary plug P at the end of the shaft, through which latter plug the rod J rotatively extends. A lever K', pivoted uponV a support independent of the shaft, engages the end of the rod J by means of the forked end k, the shoe 7c', and the collar j. The spring in its normal position holds the armature tightly against the plates.

The apparatus operates as follows: The driving-gear M being revolved, the current is turned on and passing through the coils of the magnets attracts the armature and draws it against the action of the spring until it comes in contact with the face in of said gear, as shown in Fig. Il. The frictional contact thereby produced between the armature and the said face is sufficient to cause the armature to revolve with it, and in consequence also rcvolving the shaft. \Vhen the current is shut off, the spring forces the armature back, and producing frictional contact in the frictionplates, as in the device shown in Fig. I, forms a brake and retards and stops the rotation of the shaft.

The rod J' and lever K' form a manual releasing mechanism, which operates exactly like the releasing means described and shown in Fig. I, and, as in the other device, is used in case of accident and inoperativeness of the electrical device.

Other modes of applying the principle of our invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means covered by any one of the following claims be employed.

We therefore particularly point out and distinctly claim as our invention- 1. In a brake, the combination of a magnet, an armature, a shaft, means adapted to produce a braking action upon said shaft, means adapted to actuate said armature to directly act upon said braking means to cause said braking action, said magnet adapted to attract and actuate said armature to canse said braking means to release the shaft, and means adapted to cause said release independently of said magnet, substantially as set forth.

2. In a brake, the combination of a magnet, an armature, a shaft, means adapted to produce a braking action upon said shaft, a spring adapted to actuate said armature to directly act upon said braking means to cause said braking action, said magnet adapted to attract and actuate said armature to cause said braking means to release the shaft, and manual means adapted to cause said release independently of said magnet, substantially as Set forth.

3. In a brake, the combination of a magnet, an armature, a shaft, friction-disks adapted to cooperate to produce a braking action upon said shaft, a spring adapted to actuate said armature to directly act upon said disks to cause said braking action, said magnet adapted to attract and actuate said armature to cause said disks to release the shaft, and manual means adapted to cause said release independently of said magnet, substantially as set forth.

t. In a brake, the combination of a magnet, an armature, a shaft, a set of friction-disks rotatively fixed upon said shaft, a second set of disks fixedly mounted in a stationary casing surrounding said shaft and adapted to cooperate with said first-named set to cause a braking action upon said shaft, said armaturev located betweensaid disks and magnet and adapted to be retracted therebetween relatively to said disks and magnet, a spring adapted to cause said armature to retract and the disks to be brought into contact to cause said braking action, said magnet adapted to attract and move the armature in the opposite direction therebynullifying said braking action, and manual means adapted to move said armature in the direction in which the magnet is adapted to move it, independently of said magnet, substantially as set forth.

5. The combination of a brake, consisting of alternate fixed and rotatable friction-disks, a shaft rotatable within said brake, said rotatable disks rotatively fixed to said shaft, a driving-gear loosely mounted upon said shaft, means adapted to engage said gear,said means adapted to rotate said shaft and means adapted to cause said engaging means to operate said brake whereby the braking action is applied to said shaft, substantially as set forth.

6. The combination of a brake-casing, stationary friction-disks Within said casing, an armature, friction-disks rotatively fixed upon said armature, a gear provided with electroinagnets adapted to cause engagement of said gear and armature, a shaft rotatively fixed to said armature, and means adapted to disengage said gear and armature, whereby said disks are actuated to cause a braking action upon said shaft, substantially as set forth.

' 7. The combination of a brake-casing, stationary frictiondisks Within said casing, an armature form ed With a flange, alternate friction-disks rotatively lixed upon said flange, a

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driving-gear provided with electromagnets adapted to cause engagement of said gear and armature, and a shaft rotatively fixed to said armature, and means adapted to disengage said armature from said gear whereby said disks are actuated to cause a braking action upon said shaft, substantially as set forth.

8. The combination of a brake-casing, stationary friction-disks Within said casing, an armature, friction-disks rotatably fixed upon said armature, a gear provided With electromagnets adapted to cause engagement of said gear and armature, a shaft rotatably fixed to said armature, means adapted to disengage said gear and armature whereby said disks are actuated to cause a braking action upon said shaft,and manual means adapted to cause the engagement of said gear and armature independently of said electromagnets, substantially as set forth.

9. The combination of a brake-casing, stationary friction-disks Within said casing, an

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armature formed with a flange, alternate friction-disks rotatably fixed upon said flange, a driving gear provided with electromagnets adapted to cause engagement of said gear and armature, a shaft rotatably fixed to said armature, means adapted to disengage said armature from said gear whereby said disks are actuated to causea braking action upon said shaft, and manual means adapted to cause the engagement of said gear and'armature indef pendently of said electromagnets, substantially as set forth.

lO. The combination of a brake-casing, stationaryfriction-disks within said casing, an armature, friction-disks rotatably fixed upon saidiarma'ture, a gear provided with electro-l magnets adapted to attract said armature and move it to cause engagement of said gear and armature, a shaft rotatably fixed to said armature, means adapted to actuate the latter to disengage it and said gear, whereby said disks are actuated to cause a braking action upon said shaft, manual means connected with said armature and adapted to actuate the latter to enter into engagement with said gear independently of said electromagnets, substantially as set forth.

ll. The combination of a brake-casing, a

-shaft adapted to rotate in said casing, friction-disks adapted to form a brake within said casing, an armature extending into said casing and rotatively xed to said shaft, alternate friction-plates being fastened to said casing and said armature respectively, a driving-gear rotating upon said shaft and provided with electromagnets adapted to attract said armature whereby said brake may be released, a spring Within said shaft adapted to actuate said armature to operate said brake, said armature adapted to rotatively engage said gear, substantially as set forth.

In testimony that We claim the foregoing to be our invention we hereunto set our hands this 3d day of February, 1897.

SAMUEL T. WELLMAN.

JOHN W. SEAVERA CHAS. H. WELLMAN.

Witnesses:

JOHN MCGEORGE,

CHARLEs W. CoMs'rooK. 

